Paint and varnish remover containing furfural



Patented Aug. 17, 1926.

UNITED STATES PATENT OFFICE.

GABLETON ELLIS, F MONTGLAIB, JERSEY, ASSIGNOB TO CHADELOID CHEMICALOOIPANY,"OF NEW YORK, N. Y., A CORPORATION 01' WEST VIRGINIA.

PAINT AND VABNIBE REMOVED. CONTAINING IUBIIUBAL.

Ho Drawing.

This invention relates to paint and varnish removers containing furfuraland es ecially to this solvent incorporated with ot er solvents with orwithout appropriate thick- 5 ening material and further relates tocompositions containing chlorinated solvents.

When applied by itself furfural drains oil' of vertical surfaces andthis action is aggravated by the fact that furfural does not wet thesurface readilybut tends to gather in drops. The addition of anauxiliary or co-operative solvent such as alcohol, acetone, benzol,toluol, xylol, solvent naphtha and various chlorinated solvents such ascarbon tetrachloride, acetylene tetrachloride, trichlorethylene andparticularly monochlorbenzol or monochlortoluolmay be utilized toovercome the difliculty of lack of surface wetting.

sition a thickener may be applied includln wax, soap and various otherthickeners suc as the esters of cellulose in some cases. Wax isespecially serviceable to retard the evaporation of volatile solventsand for. this urpose paraflin or ceresin wax'is best. urfural is slow toevaporate but 'may be incorporated with more volatile solvents hence mayact to retard evaporation of the latter,

is used. A small amount of wax, say from two to five per cent is usuallysuflicient, but

larger amounts may be employed in some cases. The proportion in factdepends on the nature of the other solvents. If these are solvents forwax a largpr proportion of is do not have a marked so vent action on Togive body or consistency to the compo- I Application filed Iarch 2.192s.serial Io. 022,451;-

melting the wax, dissolvingit in chlorbenzol and adding furfural.

Seven parts by volume of chlorbenzol to three parts of furfuralcontaining five per cent of wax also may be employed. The proportions ofchlorbenzol may be varied to give a major proportion of the latter ifdesired.

Compositions containing furfural with chlorbenzol or chlortoluol do notburn readily or flash as easily as more volatile solvent removers and inorder to cause ignition of the finish removing composition containingfurfural when spread on a flat surface, it is usually necessary to holda burning match close to the surface for a sufiicie'nt time to causevolatilization and production of vapors in considerable quantity inorder to produce inflammation.

Not all volatile solvents are adapted to be used with furfural, gasolineand petroleum naphtha not being mlscible and furthermore not possessingany satisfactory paint and varnish removing ualities. To secure goodresults solvents w ich are miscible should be chosen or if an immisciblesolvent is to be included the addition of blendin solvents sometimeswill bring about misci ility. In general the requirements of a paint andvarnish remover of a commercial character ne cessitate the emplo ment ofsolvents only of strong cutting qua ities and the addition ofindiflerent solvents tends to produce a low grade remover ofunsatisfactory qualities.

What I claim is:-

1. A paint and varnish remover containing furfural, another solvent oflow inflammability readily miscible therewith, and a wax, suchcomposition having the property of promptly and uniformly wettingvertical surfaces without segregating into droplets.

2. A paint and varnish remover comprising furfural, monochlorbenzol anda wax.

3. A'paint and varnish remover comprising furfural and chlorbenzol.

4. A paint and varnish remover containing furfural, chlorbenzol and athickening agent.

flammability readily miscible therewith, and 16 a thickening agent, suchcomposition having the property of promptly and uniformly wettingvertical surfaces without segregating into droplets.

GARLETON ELLIS.

